Adjustable Magnet Spacing for Magnetic Susceptibility Measurement

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Solution Overview

Problem

Existing magnetic susceptibility measurement devices face challenges in detecting magnetophoretic velocity of large particles due to the fixed product of magnetic flux density and gradient, requiring multiple magnetophoresis generation sections with different magnetic field configurations, which is inconvenient and inefficient.

Innovation Solution

A magnetic field generation device with a position adjustment mechanism that allows for control of the magnetic flux density and gradient without changing the magnets, using a vise and movable stage to adjust the position of one magnet relative to another, enabling flexible adjustment of the magnetic field parameters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the distance between two magnets is fixed to generate a great magnetic field gradient, then the magnetophoretic velocity of small particles can be detected, but the magnetophoretic velocity of large particles cannot be detected due to excessive magnetic field strength

Engineering Contradiction:

Improvedetection of magnetophoretic velocityVSAvoidapplicability to different particle sizes

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent introduces a position adjustment mechanism that enables dynamic adjustment of the distance between the two magnets. This allows the magnetic field gradient to be changed according to particle size: a small distance (0.4-1 mm) for nanoscale particles requiring high gradient, and a large distance for larger particles requiring lower gradient, thus resolving the contradiction between measurement precision for small particles and adaptability to different particle sizes

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the physical parameter of magnet distance to control the magnetic field gradient. By adjusting this parameter, the system can adapt to different particle sizes without changing the magnets themselves, solving the problem of fixed magnetic field strength that limited measurement of large particles

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If multiple magnetophoresis generation sections with different magnetic field configurations are prepared, then particles of different sizes can be analyzed, but the device complexity and preparation time increase significantly

Engineering Contradiction:

Improveanalysis capability for different particle sizesVSAvoidnumber of magnetophoresis generation sections

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent makes a single magnetophoresis generation section universal by equipping it with a position adjustment mechanism. This single device can perform the function of multiple fixed configurations by adjusting the magnet distance, thereby reducing device complexity while maintaining the ability to analyze particles of different sizes

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If multiple magnetophoresis generation sections with different magnetic field configurations are prepared, then particles of different sizes can be analyzed, but the time required to change magnets and sections increases

Engineering Contradiction:

Improveanalysis capability for different particle sizesVSAvoidtime to change magnets and sections

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The position adjustment mechanism allows dynamic switching between different magnetic field configurations without physically changing magnets or sections. This eliminates the time-consuming process of replacing components while maintaining adaptability to different particle sizes, directly addressing the time loss issue

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables precise adjustment of the magnetic field parameters to detect magnetophoretic velocities of particles of varying sizes without the need for multiple magnetophoresis sections, improving analysis efficiency and versatility.

Implementation Method 1

a first magnet (1), a second magnet (2), and a position adjustment mechanism (5)... The second magnet (2), together with the first magnet (1), generates a magnetic field

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

The position adjustment mechanism (5) adjusts a position of the first magnet (1)... controls the value of the product of a magnetic flux density and a magnetic flux density gradient in the magnetic field

Methodology Applied

Scientific EffectMagnetophoresis:

Data Source

PatentUS11105771B2Magnetic field generation device, measurement cell, analysis apparatus, and particle separation device

Publication Date: 2021.08.31 KAWANO LAB INC

AI summary

A magnetic field generation device (100) includes a first magnet (1), a second magnet (2), and a position adjustment mechanism (5). The second magnet (2), together with the first magnet (1), generates a magnetic field. The position adjustment mechanism (5) adjusts a position of the first magnet (1). The magnetic field generation device (100) controls the value of the product of a magnetic flux density and a magnetic flux density gradient in the magnetic field through the adjustment of the position of the first magnet (1) by the position adjustment mechanism (5).